[Bug 1832741] Re: Systemtap regression on Linux 5.2.0-rc4+

[Frank Ch. Eigler]

OK, that would be new -- but just make sure you're running the new stap
for that test not an accidental old one.

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Title:
  Systemtap regression on Linux 5.2.0-rc4+

Status in systemtap package in Ubuntu:
  New

Bug description:
  System tap breaks when I run the following script in Linux 5.2.0-rc4+.
  It does not break on stable kernels like 4.4.0-148-generic.

  Script:
  file.stp:

  global stats

  probe kernel.function("do_try_to_free_pages").return {
     order = @entry($sc->order)
     time = cpu_clock_ns(cpu()) - @entry(cpu_clock_ns(cpu()))
     stats["do_try_to_free_pages", execname(), order] <<< time
  }

  probe kernel.function("try_to_compact_pages").return {
     order = @entry($order)
     time = cpu_clock_ns(cpu()) - @entry(cpu_clock_ns(cpu()))
     stats["try_to_compact_pages", execname(), order] <<< time
  }

  probe end {
     foreach([f,en,order+] in stats) {
          printf("%s:%s: order %d allocation latency - ", f,en,order)
          printf("max/avg/min/count: %d/%d/%d/%d\n", @max(stats[f,en,order]), at avg(stats[f,en,order]), at min(stats[f,en,order]), at count(stats[f,en,order]))
    }
  }

  Command to execute: sudo stap -v file.stp

  Output:
  Pass 1: parsed user script and 481 library scripts using 252924virt/58296res/7128shr/51680data kb, in 440usr/10sys/441real ms.
  Pass 2: analyzed script: 5 probes, 6 functions, 4 embeds, 9 globals using 466196virt/273184res/8752shr/264952data kb, in 1670usr/430sys/2099real ms.
  Pass 3: translated to C into "/tmp/staphdai7v/stap_9a6fd3c9a6892aa42943c7a32261941b_9080_src.c" using 466196virt/273376res/8944shr/264952data kb, in 10usr/0sys/7real ms.
  In file included from <command-line>:0:0:
  ././include/linux/compiler_types.h:217:1: fatal error: /tmp/staphdai7v/stapconf_ab4ca97dc0436c6c48e82f11816eb32e_660.h: No such file or directory
   #endif /* __LINUX_COMPILER_TYPES_H */
   ^
  In file included from <command-line>:0:0:
  ././include/linux/compiler_types.h:217:1: fatal error: /tmp/staphdai7v/stapconf_ab4ca97dc0436c6c48e82f11816eb32e_660.h: No such file or directory
   #endif /* __LINUX_COMPILER_TYPES_H */
   ^
  compilation terminated.
  compilation terminated.
  make[2]: *** [/tmp/staphdai7v/stap_9a6fd3c9a6892aa42943c7a32261941b_9080_src.o] Error 1
  make[2]: *** Waiting for unfinished jobs....
  make[2]: *** [/tmp/staphdai7v/stap_9a6fd3c9a6892aa42943c7a32261941b_9080_aux_0.o] Error 1
  make[1]: *** [_module_/tmp/staphdai7v] Error 2
  make: *** [sub-make] Error 2
  WARNING: kbuild exited with status: 2
  Pass 4: compiled C into "stap_9a6fd3c9a6892aa42943c7a32261941b_9080.ko" in 300usr/170sys/454real ms.
  Pass 4: compilation failed.  [man error::pass4]

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